/**
  ******************************************************************************
  * @file    stm32373C_eval_lcd.c
  * @author  MCD Application Team
  * @version V1.0.0
  * @date    20-September-2012
  * @brief   This file includes the LCD driver for MR028-9325-51P(ILI9328)
  *          and MRE028-8347G-51P(HX8347G) Display Modules of STM32373C-EVAL.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32373C_eval_lcd.h"
#include "../Common/fonts.c"

/** @addtogroup Utilities
  * @{
  */ 

/** @addtogroup STM32_EVAL
  * @{
  */ 

/** @addtogroup STM32373C_EVAL
  * @{
  */
    
/** @defgroup STM32373C_EVAL_LCD 
  * @brief This file includes the LCD driver for MR028-9325-51P(ILI9328) 
  *        and MRE028-8347G-51P(HX8347G) Liquid Crystal Display Module of
  *        STM32373C-EVAL board.
  * @{
  */ 

/** @defgroup STM32373C_EVAL_LCD_Private_TypesDefinitions
  * @{
  */ 
/**
  * @}
  */ 

/** @defgroup STM32373C_EVAL_LCD_Private_Defines
  * @{
  */

#define START_BYTE         0x70
#define SET_INDEX          0x00
#define READ_STATUS        0x01
#define LCD_WRITE_REG      0x02
#define LCD_READ_REG       0x03
#define MAX_POLY_CORNERS   200
#define POLY_Y(Z)          ((int32_t)((Points + Z)->X))
#define POLY_X(Z)          ((int32_t)((Points + Z)->Y))                               
/**
  * @}
  */ 

/** @defgroup STM32373C_EVAL_LCD_Private_Macros
  * @{
  */
#define ABS(X)  ((X) > 0 ? (X) : -(X))    
/**
  * @}
  */ 
  
/** @defgroup STM32373C_EVAL_LCD_Private_Variables
  * @{
  */ 
static sFONT *LCD_Currentfonts;
/* Global variables to set the written text color */
static  __IO uint16_t TextColor = 0x0000, BackColor = 0xFFFF;
uint16_t LCDType = 0;
static uint8_t StartX = 0;
static uint32_t StartY = 0;
/**
  * @}
  */ 

/** @defgroup STM32373C_EVAL_LCD_Private_FunctionPrototypes
  * @{
  */ 
#ifndef USE_Delay
static void delay(__IO uint32_t nCount);
#endif /* USE_Delay*/

static void PutPixel(int16_t x, int16_t y);
static void LCD_PolyLineRelativeClosed(pPoint Points, uint16_t PointCount, uint16_t Closed);

/**
  * @}
  */ 

/** @defgroup STM32373C_EVAL_LCD_Private_Functions
  * @{
  */ 

/**
  * @brief  DeInitializes the LCD.
  * @param  None
  * @retval None
  */
void LCD_DeInit(void)
{ 
  GPIO_InitTypeDef GPIO_InitStructure;

  /*!< LCD Display Off */
  LCD_DisplayOff();

  /*!< LCD_SPI disable */
  SPI_Cmd(LCD_SPI, DISABLE);
  
  /*!< LCD_SPI DeInit */
  SPI_I2S_DeInit(LCD_SPI);
   
  /*!< Disable SPI clock  */
  RCC_APB1PeriphClockCmd(LCD_SPI_CLK, DISABLE);
    
  /* Configure NCS in Output Push-Pull mode */
  GPIO_InitStructure.GPIO_Pin = LCD_NCS_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(LCD_NCS_GPIO_PORT, &GPIO_InitStructure);
   
  /* Configure SPI pins: SCK, MISO and MOSI */
  GPIO_InitStructure.GPIO_Pin = LCD_SPI_SCK_PIN;
  GPIO_Init(LCD_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = LCD_SPI_MISO_PIN;
  GPIO_Init(LCD_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
  
  GPIO_InitStructure.GPIO_Pin = LCD_SPI_MOSI_PIN;
  GPIO_Init(LCD_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);
}

/**
  * @brief  Initializes the LCD.
  * @param  None
  * @retval None
  */
void STM32373C_LCD_Init(void)
{ 
  /* Configure the LCD Control pins --------------------------------------------*/
  LCD_CtrlLinesConfig();
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_RESET);
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
  
  /* Configure the LCD_SPI interface -------------------------------------------*/
  LCD_SPIConfig(); 
  
  /* Read LCD controller ID */
  LCDType = LCD_ReadReg(LCD_REG_0);
  /* Delay 50 ms */
  _delay_(5);
  
  if(LCDType == LCD_HX8347G)
  {
    /* Driving ability setting */
    LCD_WriteReg(LCD_REG_234, 0x00);
    LCD_WriteReg(LCD_REG_235, 0x20);
    LCD_WriteReg(LCD_REG_236, 0x0C);
    LCD_WriteReg(LCD_REG_237, 0xC4);
    LCD_WriteReg(LCD_REG_232, 0x40);
    LCD_WriteReg(LCD_REG_233, 0x38);
    LCD_WriteReg(LCD_REG_241, 0x01);
    LCD_WriteReg(LCD_REG_242, 0x10);
    LCD_WriteReg(LCD_REG_39, 0xA3);

    /* Adjust the Gamma Curve */
    LCD_WriteReg(LCD_REG_64, 0x01);
    LCD_WriteReg(LCD_REG_65, 0x00);
    LCD_WriteReg(LCD_REG_66, 0x00);
    LCD_WriteReg(LCD_REG_67, 0x10);
    LCD_WriteReg(LCD_REG_68, 0x0E);
    LCD_WriteReg(LCD_REG_69, 0x24);
    LCD_WriteReg(LCD_REG_70, 0x04);
    LCD_WriteReg(LCD_REG_71, 0x50);
    LCD_WriteReg(LCD_REG_72, 0x02);
    LCD_WriteReg(LCD_REG_73, 0x13);
    LCD_WriteReg(LCD_REG_74, 0x19);
    LCD_WriteReg(LCD_REG_75, 0x19);
    LCD_WriteReg(LCD_REG_76, 0x16);
    LCD_WriteReg(LCD_REG_80, 0x1B);
    LCD_WriteReg(LCD_REG_81, 0x31);
    LCD_WriteReg(LCD_REG_82, 0x2F);
    LCD_WriteReg(LCD_REG_83, 0x3F);
    LCD_WriteReg(LCD_REG_84, 0x3F);
    LCD_WriteReg(LCD_REG_85, 0x3E);
    LCD_WriteReg(LCD_REG_86, 0x2F);
    LCD_WriteReg(LCD_REG_87, 0x7B);
    LCD_WriteReg(LCD_REG_88, 0x09);
    LCD_WriteReg(LCD_REG_89, 0x06);
    LCD_WriteReg(LCD_REG_90, 0x06);
    LCD_WriteReg(LCD_REG_91, 0x0C);
    LCD_WriteReg(LCD_REG_92, 0x1D);
    LCD_WriteReg(LCD_REG_93, 0xCC);

    /* Power voltage setting */
    LCD_WriteReg(LCD_REG_27, 0x1B);
    LCD_WriteReg(LCD_REG_26, 0x01);
    LCD_WriteReg(LCD_REG_36, 0x2F);
    LCD_WriteReg(LCD_REG_37, 0x57);
    /*****VCOM offset ****/
    LCD_WriteReg(LCD_REG_35, 0x86);

    /* Power on setting up flow */
    LCD_WriteReg(LCD_REG_24, 0x36); /* Display frame rate = 70Hz RADJ = '0110' */
    LCD_WriteReg(LCD_REG_25, 0x01); /* OSC_EN = 1 */
    LCD_WriteReg(LCD_REG_28, 0x06); /* AP[2:0] = 111 */
    LCD_WriteReg(LCD_REG_29, 0x06); /* AP[2:0] = 111 */
    LCD_WriteReg(LCD_REG_31,0x90); /* GAS=1, VOMG=00, PON=1, DK=0, XDK=0, DVDH_TRI=0, STB=0*/
    LCD_WriteReg(LCD_REG_39, 1); /* REF = 1 */
    _delay_(10);

    /* 262k/65k color selection */
    LCD_WriteReg(LCD_REG_23, 0x05); /* default 0x06 262k color,  0x05 65k color */
    /* SET PANEL */
    LCD_WriteReg(LCD_REG_54, 0x09); /* SS_PANEL = 1, GS_PANEL = 0,REV_PANEL = 0, BGR_PANEL = 1 */

    /* Display ON flow */
    LCD_WriteReg(LCD_REG_40, 0x38); /* GON=1, DTE=1, D=10 */
    _delay_(60);
    LCD_WriteReg(LCD_REG_40, 0x3C); /* GON=1, DTE=1, D=11 */

    /* Set GRAM Area - Partial Display Control */
    LCD_WriteReg(LCD_REG_1, 0x00); /* DP_STB = 0, DP_STB_S = 0, SCROLL = 0, */
    LCD_WriteReg(LCD_REG_2, 0x00); /* Column address start 2 */
    LCD_WriteReg(LCD_REG_3, 0x00); /* Column address start 1 */
    LCD_WriteReg(LCD_REG_4, 0x01); /* Column address end 2 */
    LCD_WriteReg(LCD_REG_5, 0x3F); /* Column address end 1 */
    LCD_WriteReg(LCD_REG_6, 0x00); /* Row address start 2 */
    LCD_WriteReg(LCD_REG_7, 0x00); /* Row address start 2 */
    LCD_WriteReg(LCD_REG_8, 0x00); /* Row address end 2 */
    LCD_WriteReg(LCD_REG_9, 0xEF); /* Row address end 1 */
    LCD_WriteReg(LCD_REG_22, 0xA0); /* Memory access control: MY = 1, MX = 0, MV = 1, ML = 0 */
  }
  else
  {
    /* Start Initial Sequence ------------------------------------------------*/
    LCD_WriteReg(LCD_REG_0,  0x0001); /* Start internal OSC. */
    LCD_WriteReg(LCD_REG_1,  0x0100); /* set SS and SM bit */
    LCD_WriteReg(LCD_REG_2,  0x0700); /* set 1 line inversion */
    LCD_WriteReg(LCD_REG_3,  0x1018); /* set GRAM write direction and BGR=1. */
    LCD_WriteReg(LCD_REG_4,  0x0000); /* Resize register */
    
    LCD_WriteReg(LCD_REG_8,  0x0302); /* set the back porch and front porch */
    LCD_WriteReg(LCD_REG_9,  0x0000); /* set non-display area refresh cycle ISC[3:0] */
    LCD_WriteReg(LCD_REG_10, 0x0000); /* FMARK function */
    
    LCD_WriteReg(LCD_REG_12, 0x0000); /* RGB interface setting */
    LCD_WriteReg(LCD_REG_13, 0x0000); /* Frame marker Position */
    LCD_WriteReg(LCD_REG_15, 0x0000); /* RGB interface polarity */
  
    /* Power On sequence -----------------------------------------------------*/
    LCD_WriteReg(LCD_REG_16, 0x0000); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
    LCD_WriteReg(LCD_REG_17, 0x0000); /* DC1[2:0], DC0[2:0], VC[2:0] */
    LCD_WriteReg(LCD_REG_18, 0x0000); /* VREG1OUT voltage */
    LCD_WriteReg(LCD_REG_19, 0x0000); /* VDV[4:0] for VCOM amplitude */
    _delay_(20);                      /* Dis-charge capacitor power voltage (200ms) */
    LCD_WriteReg(LCD_REG_16, 0x14B0); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
    _delay_(5);                       /* Delay 50 ms */
    LCD_WriteReg(LCD_REG_17, 0x0007); /* DC1[2:0], DC0[2:0], VC[2:0] */
    _delay_(5);                       /* Delay 50 ms */
    LCD_WriteReg(LCD_REG_18, 0x0018); /* VREG1OUT voltage */
    _delay_(5);                       /* Delay 50 ms */
    LCD_WriteReg(LCD_REG_19, 0x1000); /* VDV[4:0] for VCOM amplitude */
    LCD_WriteReg(LCD_REG_41, 0x0015); /* VCM[4:0] for VCOMH */
    _delay_(5);                       /* Delay 50 ms */
    LCD_WriteReg(LCD_REG_32, 0x0000); /* GRAM horizontal Address */
    LCD_WriteReg(LCD_REG_33, 0x0000); /* GRAM Vertical Address */
    _delay_(50);
    
    /* Adjust the Gamma Curve ------------------------------------------------*/
    LCD_WriteReg(LCD_REG_48, 0x0000);
    LCD_WriteReg(LCD_REG_49, 0x0107);
    LCD_WriteReg(LCD_REG_50, 0x0000);
    LCD_WriteReg(LCD_REG_53, 0x0203);
    
    LCD_WriteReg(LCD_REG_54, 0x0402);

    LCD_WriteReg(LCD_REG_55, 0x0000);
    LCD_WriteReg(LCD_REG_56, 0x0207);
    LCD_WriteReg(LCD_REG_57, 0x0000);
    LCD_WriteReg(LCD_REG_60, 0x0203);
    LCD_WriteReg(LCD_REG_61, 0x0403);
  
    /* Set GRAM area ---------------------------------------------------------*/
    LCD_WriteReg(LCD_REG_80, 0x0000); /* Horizontal GRAM Start Address */
    LCD_WriteReg(LCD_REG_81, 0x00EF); /* Horizontal GRAM End Address */
    LCD_WriteReg(LCD_REG_82, 0x0000); /* Vertical GRAM Start Address */
    LCD_WriteReg(LCD_REG_83, 0x013F); /* Vertical GRAM End Address */
    LCD_WriteReg(LCD_REG_96,  0xA700); /* Gate Scan Line */
    LCD_WriteReg(LCD_REG_97,  0x0003); /* NDL,VLE, REV */
    LCD_WriteReg(LCD_REG_106, 0x0000); /* set scrolling line */
   
    /* Partial Display Control -----------------------------------------------*/
    LCD_WriteReg(LCD_REG_128, 0x0000);
    LCD_WriteReg(LCD_REG_129, 0x0000);
    LCD_WriteReg(LCD_REG_130, 0x0000);
    LCD_WriteReg(LCD_REG_131, 0x0000);
    LCD_WriteReg(LCD_REG_132, 0x0000);
    LCD_WriteReg(LCD_REG_133, 0x0000);
  
    /* Panel Control ---------------------------------------------------------*/
    LCD_WriteReg(LCD_REG_144, 0x0010);
    LCD_WriteReg(LCD_REG_146, 0x0000);
    LCD_WriteReg(LCD_REG_147, 0x0003);
    LCD_WriteReg(LCD_REG_149, 0x0110);
    LCD_WriteReg(LCD_REG_151, 0x0000);
    LCD_WriteReg(LCD_REG_152, 0x0000);
    /* Set GRAM write direction and BGR = 1 */
    /* I/D=01 (Horizontal : increment, Vertical : decrement) */
    /* AM=1 (address is updated in vertical writing direction) */
    LCD_WriteReg(LCD_REG_3, 0x1018);
    LCD_WriteReg(LCD_REG_7, 0x0133); /* 262K color and display ON */
  }
  
  /* Set default font */    
  LCD_SetFont(&LCD_DEFAULT_FONT);
}

/**
  * @brief  Swap the display direction. This is useful when displaying bmp files.
  * @param  None.
  * @retval None
  */
void LCD_SwapDirection(FunctionalState NewState)
{
  if (NewState != DISABLE)
  {
    if(LCDType == LCD_HX8347G)
    {
      /* Memory access control: MY = 1, MX = 1, MV = 1, ML = 0 */
      LCD_WriteReg(LCD_REG_22, 0xE0);
    }
    else
    {
      /* Set GRAM write direction and BGR = 1 */
      /* I/D=00 (Horizontal : decrement, Vertical : decrement) */
      /* AM=1 (address is updated in vertical writing direction) */
      LCD_WriteReg(LCD_REG_3, 0x1008);
    }
  }
  else
  {
    if(LCDType == LCD_HX8347G)
    {
      /* Memory access control: MY = 1, MX = 0, MV = 1, ML = 0 */
      LCD_WriteReg(LCD_REG_22, 0xA0);
    }
    else
    {
      /* Set GRAM write direction and BGR = 1 */
      /* I/D=00 (Horizontal : decrement, Vertical : decrement) */
      /* AM=1 (address is updated in vertical writing direction) */
      LCD_WriteReg(LCD_REG_3, 0x1018);
    }    
  } 
}

/**
  * @brief  Sets the LCD Text and Background colors.
  * @param  _TextColor: specifies the Text Color.
  * @param  _BackColor: specifies the Background Color.
  * @retval None
  */
void LCD_SetColors(__IO uint16_t _TextColor, __IO uint16_t _BackColor)
{
  TextColor = _TextColor; 
  BackColor = _BackColor;
}

/**
  * @brief  Gets the LCD Text and Background colors.
  * @param  _TextColor: pointer to the variable that will contain the Text 
            Color.
  * @param  _BackColor: pointer to the variable that will contain the Background 
            Color.
  * @retval None
  */
void LCD_GetColors(__IO uint16_t *_TextColor, __IO uint16_t *_BackColor)
{
  *_TextColor = TextColor; *_BackColor = BackColor;
}

/**
  * @brief  Sets the Text color.
  * @param  Color: specifies the Text color code RGB(5-6-5).
  * @retval None
  */
void LCD_SetTextColor(__IO uint16_t Color)
{
  TextColor = Color;
}


/**
  * @brief  Sets the Background color.
  * @param  Color: specifies the Background color code RGB(5-6-5).
  * @retval None
  */
void LCD_SetBackColor(__IO uint16_t Color)
{
  BackColor = Color;
}

/**
  * @brief  Sets the Text Font.
  * @param  fonts: specifies the font to be used.
  * @retval None
  */
void LCD_SetFont(sFONT *fonts)
{
  LCD_Currentfonts = fonts;
}

/**
  * @brief  Gets the Text Font.
  * @param  None.
  * @retval the used font.
  */
sFONT *LCD_GetFont(void)
{
  return LCD_Currentfonts;
}

/**
  * @brief  Clears the selected line.
  * @param  Line: the Line to be cleared.
  *   This parameter can be one of the following values:
  *     @arg Linex: where x can be 0..n
  * @retval None
  */
void LCD_ClearLine(uint8_t Line)
{
  uint16_t refcolumn = 319;
  int16_t deltacolumn = -LCD_Currentfonts->Width;
  uint32_t i = 0;

  /* Send the string character by character on lCD */
  while (i <= 320/LCD_Currentfonts->Width)
  {
    /* Display one character on LCD */
    LCD_DisplayChar(Line, refcolumn, ' ');
    /* Decrement the column position by deltacolumn(16 or -16 for HX8347G) */
    refcolumn += deltacolumn;
    /* Increment the character counter */
    i++;
  }
}


/**
  * @brief  Clears the hole LCD.
  * @param  Color: the color of the background.
  * @retval None
  */
void LCD_Clear(uint16_t Color)
{
  uint32_t index = 0;

  if(LCDType == LCD_HX8347G)
  {
    LCD_SetCursor(0, 0);
  }
  else
  {
    LCD_SetCursor(0, 319);
  }  
 
  /* Prepare to write GRAM */
  LCD_WriteRAM_Prepare();
  
  for(index = 0; index < (uint32_t)320*240; index++)
  {
    LCD_WriteRAM(Color);
  }
  
  /* Wait until a data is sent(not busy), before config /CS HIGH */
  while (SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET); 
}


/**
  * @brief  Sets the cursor position.
  * @param  Xpos: specifies the X position.
  * @param  Ypos: specifies the Y position. 
  * @retval None
  */
void LCD_SetCursor(uint16_t Xpos, uint16_t Ypos)
{
  if(LCDType == LCD_HX8347G)
  {
    LCD_WriteReg(LCD_REG_6, 0x00);
    LCD_WriteReg(LCD_REG_7, Xpos);
    LCD_WriteReg(LCD_REG_2, Ypos >> 8);
    LCD_WriteReg(LCD_REG_3, Ypos & 0xFF);
  }
  else
  {
    LCD_WriteReg(LCD_REG_32, Xpos);
    LCD_WriteReg(LCD_REG_33, Ypos);
  }
}

/**
  * @brief  Draws a character on LCD.
  * @param  Xpos: the Line where to display the character shape.
  * @param  Ypos: start column address.
  * @param  c: pointer to the character data.
  * @retval None
  */
void LCD_DrawChar(uint8_t Xpos, uint16_t Ypos, const uint16_t *c)
{
  uint32_t index = 0, i = 0;
  uint8_t Xaddress = 0;
   
  Xaddress = Xpos;
  
  LCD_SetCursor(Xaddress, Ypos);
  
  for(index = 0; index < LCD_Currentfonts->Height; index++)
  {
    LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */

    for(i = 0; i < LCD_Currentfonts->Width; i++)
    {
      if((((c[index] & ((0x80 << ((LCD_Currentfonts->Width / 12 ) * 8 ) ) >> i)) == 0x00) &&(LCD_Currentfonts->Width <= 12))||
        (((c[index] & (0x1 << i)) == 0x00)&&(LCD_Currentfonts->Width > 12 )))

      {
        LCD_WriteRAM(BackColor);
      }
      else
      {
        LCD_WriteRAM(TextColor);
      }
    }
    
    /* Wait until a data is sent(not busy), before config /CS HIGH */
    while (SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
    LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET); 
    Xaddress++;
    LCD_SetCursor(Xaddress, Ypos);
  }
}


/**
  * @brief  Displays one character (16dots width, 24dots height).
  * @param  Line: the Line where to display the character shape .
  *   This parameter can be one of the following values:
  *     @arg Linex: where x can be 0..9
  * @param  Column: start column address.
  * @param  Ascii: character ascii code, must be between 0x20 and 0x7E.
  * @retval None
  */
void LCD_DisplayChar(uint8_t Line, uint16_t Column, uint8_t Ascii)
{
  Ascii -= 32;
  
  if(LCDType == LCD_HX8347G)
  {
    Column = 319 - Column;
  }
  
  LCD_DrawChar(Line, Column, &LCD_Currentfonts->table[Ascii * LCD_Currentfonts->Height]);
}


/**
  * @brief  Displays a maximum of 20 char on the LCD.
  * @param  Line: the Line where to display the character shape .
  *   This parameter can be one of the following values:
  *     @arg Linex: where x can be 0..9
  * @param  *ptr: pointer to string to display on LCD.
  * @retval None
  */
void LCD_DisplayStringLine(uint8_t Line, uint8_t *ptr)
{
  uint16_t refcolumn = 0;
  int16_t deltacolumn;

  refcolumn = 319;
  deltacolumn = -LCD_Currentfonts->Width;

  /* Send the string character by character on lCD */
  while (*ptr != 0)
  {
    /* Display one character on LCD */
    LCD_DisplayChar(Line, refcolumn, *ptr);
    /* Decrement the column position by deltacolumn(16 or -16 for HX8347G) */
    refcolumn += deltacolumn;
    /* Point on the next character */
    ptr++;
  }
}


/**
  * @brief  Sets a display window
  * @param  Xpos: specifies the X buttom left position.
  * @param  Ypos: specifies the Y buttom left position.
  * @param  Height: display window height.
  * @param  Width: display window width.
  * @retval None
  */
void LCD_SetDisplayWindow(uint8_t Xpos, uint16_t Ypos, uint8_t Height, uint16_t Width)
{
  uint16_t EndY = 0;
  uint8_t EndX = 0;

  if(LCDType == LCD_HX8347G)
  {
    Ypos = 319 - Ypos + Width - 1;
    /* Horizontal GRAM Start Address */
    if(Xpos >= Height)
    {
      EndX = Xpos - Height + 1;
    }
    else
    {
      /* store StartX */
      EndX = 0;
    }

    /* Horizontal GRAM Start Address */
    if(Ypos >= Width)
    {
      EndY = Ypos - Width + 1;
    }
    else
    {
      /* store StartY */
      EndY = 0;
    }
    /* Horizontal GRAM Start Address */
    StartY = EndY;
    LCD_WriteReg(LCD_REG_2, StartY >> 8);
    LCD_WriteReg(LCD_REG_3, StartY & 0xFF);
    
    /* Horizontal GRAM End Address */
    LCD_WriteReg(LCD_REG_4, (Ypos) >> 8);
    LCD_WriteReg(LCD_REG_5, (Ypos) & 0xFF);
  
    /* Vertical GRAM Start Address */
    StartX = EndX;
    LCD_WriteReg(LCD_REG_6, StartX >> 8);
    LCD_WriteReg(LCD_REG_7, StartX);

    /* Vertical GRAM End Address */
    LCD_WriteReg(LCD_REG_8, Xpos >> 8);
    LCD_WriteReg(LCD_REG_9, Xpos);    
  }
  else
  {
    /* Horizontal GRAM Start Address */
    if(Xpos >= Height)
    {
      LCD_WriteReg(LCD_REG_80, (Xpos - Height + 1));
    }
    else
    {
      LCD_WriteReg(LCD_REG_80, 0);
    }
    /* Horizontal GRAM End Address */
    LCD_WriteReg(LCD_REG_81, Xpos);
    /* Vertical GRAM Start Address */
    if(Ypos >= Width)
    {
      LCD_WriteReg(LCD_REG_82, (Ypos - Width + 1));
    }  
    else
    {
      LCD_WriteReg(LCD_REG_82, 0);
    }
    /* Vertical GRAM End Address */
    LCD_WriteReg(LCD_REG_83, Ypos);
  
    LCD_SetCursor(Xpos, Ypos);
  }
}


/**
  * @brief  Disables LCD Window mode.
  * @param  None
  * @retval None
  */
void LCD_WindowModeDisable(void)
{
  if(LCDType == LCD_HX8347G)
  {
    LCD_SetDisplayWindow(239, 0x13F, 240, 320);
  }
  else
  {
    LCD_SetDisplayWindow(239, 0x13F, 240, 320);
    LCD_WriteReg(LCD_REG_3, 0x1018);
  }
}

/**
  * @brief  Displays a line.
  * @param Xpos: specifies the X position.
  * @param Ypos: specifies the Y position.
  * @param Length: line length.
  * @param Direction: line direction.
  *   This parameter can be one of the following values: Vertical or Horizontal.
  * @retval None
  */
void LCD_DrawLine(uint16_t Xpos, uint16_t Ypos, uint16_t Length, uint8_t Direction)
{
  uint32_t i = 0;
  
  if(LCDType == LCD_HX8347G)
  {
    LCD_SetCursor(Xpos, 319 - Ypos);
  }
  else
  {
    LCD_SetCursor(Xpos, Ypos);
  }
  
  if(Direction == LCD_DIR_HORIZONTAL)
  { 
    LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */
    
    for(i = 0; i < Length; i++)
    {
      LCD_WriteRAM(TextColor);
    }
    /* Wait until a data is sent(not busy), before config /CS HIGH */
    while (SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
    LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
  }
  else
  {
    for(i = 0; i < Length; i++)
    {
      LCD_WriteRAMWord(TextColor);
      Xpos++;
      if(LCDType == LCD_HX8347G)
      {
        LCD_SetCursor(Xpos, 319 - Ypos);
      }
      else
      {
        LCD_SetCursor(Xpos, Ypos);
      }
    }
  }
}


/**
  * @brief  Displays a rectangle.
  * @param  Xpos: specifies the X position.
  * @param  Ypos: specifies the Y position.
  * @param  Height: display rectangle height.
  * @param  Width: display rectangle width.
  * @retval None
  */
void LCD_DrawRect(uint16_t Xpos, uint16_t Ypos, uint8_t Height, uint16_t Width)
{
  LCD_DrawLine(Xpos, Ypos, Width, LCD_DIR_HORIZONTAL);
  LCD_DrawLine((Xpos + Height), Ypos, Width, LCD_DIR_HORIZONTAL);
  
  LCD_DrawLine(Xpos, Ypos, Height, LCD_DIR_VERTICAL);
  LCD_DrawLine(Xpos, (Ypos - Width + 1), Height, LCD_DIR_VERTICAL);
}


/**
  * @brief  Displays a circle.
  * @param  Xpos: specifies the X position.
  * @param  Ypos: specifies the Y position.
  * @param  Radius
  * @retval None
  */
void LCD_DrawCircle(uint16_t Xpos, uint16_t Ypos, uint16_t Radius)
{
  int32_t  D;/* Decision Variable */ 
  uint32_t  CurX;/* Current X Value */
  uint32_t  CurY;/* Current Y Value */ 

  if(LCDType == LCD_HX8347G)
  {
    Ypos = 319 - Ypos;
  }
    
  D = 3 - (Radius << 1);
  CurX = 0;
  CurY = Radius;
  
  while (CurX <= CurY)
  {
    LCD_SetCursor(Xpos + CurX, Ypos + CurY);
    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos + CurX, Ypos - CurY); 
    LCD_WriteRAMWord(TextColor);
    
    LCD_SetCursor(Xpos - CurX, Ypos + CurY);
    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos - CurX, Ypos - CurY);
    LCD_WriteRAMWord(TextColor);
 
    LCD_SetCursor(Xpos + CurY, Ypos + CurX);
    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos + CurY, Ypos - CurX);
    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos - CurY, Ypos + CurX);
    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos - CurY, Ypos - CurX);
    LCD_WriteRAMWord(TextColor);

     if (D < 0)
    { 
      D += (CurX << 2) + 6;
    }
    else
    {
      D += ((CurX - CurY) << 2) + 10;
      CurY--;
    }
    CurX++;
  }
}


/**
  * @brief  Displays a monocolor picture.
  * @param  Pict: pointer to the picture array.
  * @retval None
  */
void LCD_DrawMonoPict(const uint32_t *Pict)
{
  uint32_t index = 0, i = 0;

  if(LCDType == LCD_HX8347G)
  {
    LCD_SetCursor(0, 319 - (LCD_PIXEL_WIDTH - 1));
  }
  else
  {
    LCD_SetCursor(0, (LCD_PIXEL_WIDTH - 1));
  }  
  
  LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */
  
  for(index = 0; index < 2400; index++)
  {
    for(i = 0; i < 32; i++)
    {
      if((Pict[index] & (1 << i)) == 0x00)
      {
        LCD_WriteRAM(BackColor);
      }
      else
      {
        LCD_WriteRAM(TextColor);
      }
    }
  }
  /* Wait until a data is sent(not busy), before config /CS HIGH */
  while (SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}


/**
  * @brief  Displays a full rectangle.
  * @param  Xpos: specifies the X position.
  * @param  Ypos: specifies the Y position.
  * @param  Height: rectangle height.
  * @param  Width: rectangle width.
  * @retval None
  */
void LCD_DrawFullRect(uint16_t Xpos, uint16_t Ypos, uint16_t Width, uint16_t Height)
{
  LCD_SetTextColor(TextColor);

  LCD_DrawLine(Xpos, Ypos, Width, LCD_DIR_HORIZONTAL);
  LCD_DrawLine((Xpos + Height), Ypos, Width, LCD_DIR_HORIZONTAL);
  
  LCD_DrawLine(Xpos, Ypos, Height, LCD_DIR_VERTICAL);
  LCD_DrawLine(Xpos, (Ypos - Width + 1), Height, LCD_DIR_VERTICAL);

  Width -= 2;
  Height--;
  Ypos--;

  LCD_SetTextColor(BackColor);

  while(Height--)
  {
    LCD_DrawLine(++Xpos, Ypos, Width, LCD_DIR_HORIZONTAL);    
  }

  LCD_SetTextColor(TextColor);
}

/**
  * @brief  Displays a full circle.
  * @param  Xpos: specifies the X position.
  * @param  Ypos: specifies the Y position.
  * @param  Radius
  * @retval None
  */
void LCD_DrawFullCircle(uint16_t Xpos, uint16_t Ypos, uint16_t Radius)
{
  int32_t  D;    /* Decision Variable */ 
  uint32_t  CurX;/* Current X Value */
  uint32_t  CurY;/* Current Y Value */ 
  
  D = 3 - (Radius << 1);

  CurX = 0;
  CurY = Radius;
  
  LCD_SetTextColor(BackColor);

  while (CurX <= CurY)
  {
    if(CurY > 0) 
    {
      LCD_DrawLine(Xpos - CurX, Ypos + CurY, 2*CurY, LCD_DIR_HORIZONTAL);
      LCD_DrawLine(Xpos + CurX, Ypos + CurY, 2*CurY, LCD_DIR_HORIZONTAL);
    }

    if(CurX > 0) 
    {
      LCD_DrawLine(Xpos - CurY, Ypos + CurX, 2*CurX, LCD_DIR_HORIZONTAL);
      LCD_DrawLine(Xpos + CurY, Ypos + CurX, 2*CurX, LCD_DIR_HORIZONTAL);
    }
    if (D < 0)
    { 
      D += (CurX << 2) + 6;
    }
    else
    {
      D += ((CurX - CurY) << 2) + 10;
      CurY--;
    }
    CurX++;
  }

  LCD_SetTextColor(TextColor);
  LCD_DrawCircle(Xpos, Ypos, Radius);
}

/**
  * @brief  Displays an uni line (between two points).
  * @param  x1: specifies the point 1 x position.
  * @param  y1: specifies the point 1 y position.
  * @param  x2: specifies the point 2 x position.
  * @param  y2: specifies the point 2 y position.
  * @retval None
  */
void LCD_DrawUniLine(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
{
  int16_t deltax = 0, deltay = 0, x = 0, y = 0, xinc1 = 0, xinc2 = 0, 
  yinc1 = 0, yinc2 = 0, den = 0, num = 0, numadd = 0, numpixels = 0, 
  curpixel = 0;
  
  deltax = ABS(x2 - x1);        /* The difference between the x's */
  deltay = ABS(y2 - y1);        /* The difference between the y's */
  x = x1;                       /* Start x off at the first pixel */
  y = y1;                       /* Start y off at the first pixel */
  
  if (x2 >= x1)                 /* The x-values are increasing */
  {
    xinc1 = 1;
    xinc2 = 1;
  }
  else                          /* The x-values are decreasing */
  {
    xinc1 = -1;
    xinc2 = -1;
  }
  
  if (y2 >= y1)                 /* The y-values are increasing */
  {
    yinc1 = 1;
    yinc2 = 1;
  }
  else                          /* The y-values are decreasing */
  {
    yinc1 = -1;
    yinc2 = -1;
  }
  
  if (deltax >= deltay)         /* There is at least one x-value for every y-value */
  {
    xinc1 = 0;                  /* Don't change the x when numerator >= denominator */
    yinc2 = 0;                  /* Don't change the y for every iteration */
    den = deltax;
    num = deltax / 2;
    numadd = deltay;
    numpixels = deltax;         /* There are more x-values than y-values */
  }
  else                          /* There is at least one y-value for every x-value */
  {
    xinc2 = 0;                  /* Don't change the x for every iteration */
    yinc1 = 0;                  /* Don't change the y when numerator >= denominator */
    den = deltay;
    num = deltay / 2;
    numadd = deltax;
    numpixels = deltay;         /* There are more y-values than x-values */
  }
  
  for (curpixel = 0; curpixel <= numpixels; curpixel++)
  {
    PutPixel(x, y);             /* Draw the current pixel */
    num += numadd;              /* Increase the numerator by the top of the fraction */
    if (num >= den)             /* Check if numerator >= denominator */
    {
      num -= den;               /* Calculate the new numerator value */
      x += xinc1;               /* Change the x as appropriate */
      y += yinc1;               /* Change the y as appropriate */
    }
    x += xinc2;                 /* Change the x as appropriate */
    y += yinc2;                 /* Change the y as appropriate */
  }
}

/**
  * @brief  Displays an polyline (between many points).
  * @param  Points: pointer to the points array.
  * @param  PointCount: Number of points.
  * @retval None
  */
void LCD_PolyLine(pPoint Points, uint16_t PointCount)
{
  int16_t X = 0, Y = 0;

  if(PointCount < 2)
  {
    return;
  }

  while(--PointCount)
  {
    X = Points->X;
    Y = Points->Y;
    Points++;
    LCD_DrawUniLine(X, Y, Points->X, Points->Y);
  }
}

/**
  * @brief  Displays an relative polyline (between many points).
  * @param  Points: pointer to the points array.
  * @param  PointCount: Number of points.
  * @param  Closed: specifies if the draw is closed or not.
  *           1: closed, 0 : not closed.
  * @retval None
  */
static void LCD_PolyLineRelativeClosed(pPoint Points, uint16_t PointCount, uint16_t Closed)
{
  int16_t X = 0, Y = 0;
  pPoint First = Points;

  if(PointCount < 2)
  {
    return;
  }  
  X = Points->X;
  Y = Points->Y;
  while(--PointCount)
  {
    Points++;
    LCD_DrawUniLine(X, Y, X + Points->X, Y + Points->Y);
    X = X + Points->X;
    Y = Y + Points->Y;
  }
  if(Closed)
  {
    LCD_DrawUniLine(First->X, First->Y, X, Y);
  }  
}

/**
  * @brief  Displays a closed polyline (between many points).
  * @param  Points: pointer to the points array.
  * @param  PointCount: Number of points.
  * @retval None
  */
void LCD_ClosedPolyLine(pPoint Points, uint16_t PointCount)
{
  LCD_PolyLine(Points, PointCount);
  LCD_DrawUniLine(Points->X, Points->Y, (Points+PointCount-1)->X, (Points+PointCount-1)->Y);
}

/**
  * @brief  Displays a relative polyline (between many points).
  * @param  Points: pointer to the points array.
  * @param  PointCount: Number of points.
  * @retval None
  */
void LCD_PolyLineRelative(pPoint Points, uint16_t PointCount)
{
  LCD_PolyLineRelativeClosed(Points, PointCount, 0);
}

/**
  * @brief  Displays a closed relative polyline (between many points).
  * @param  Points: pointer to the points array.
  * @param  PointCount: Number of points.
  * @retval None
  */
void LCD_ClosedPolyLineRelative(pPoint Points, uint16_t PointCount)
{
  LCD_PolyLineRelativeClosed(Points, PointCount, 1);
}


/**
  * @brief  Displays a  full polyline (between many points).
  * @param  Points: pointer to the points array.
  * @param  PointCount: Number of points.
  * @retval None
  */
void LCD_FillPolyLine(pPoint Points, uint16_t PointCount)
{
  /*  public-domain code by Darel Rex Finley, 2007 */
  uint16_t  nodes = 0, nodeX[MAX_POLY_CORNERS], pixelX = 0, pixelY = 0, i = 0,
  j = 0, swap = 0;
  uint16_t  IMAGE_LEFT = 0, IMAGE_RIGHT = 0, IMAGE_TOP = 0, IMAGE_BOTTOM = 0;

  IMAGE_LEFT = IMAGE_RIGHT = Points->X;
  IMAGE_TOP= IMAGE_BOTTOM = Points->Y;

  for(i = 1; i < PointCount; i++)
  {
    pixelX = POLY_X(i);
    if(pixelX < IMAGE_LEFT)
    {
      IMAGE_LEFT = pixelX;
    }
    if(pixelX > IMAGE_RIGHT)
    {
      IMAGE_RIGHT = pixelX;
    }
    
    pixelY = POLY_Y(i);
    if(pixelY < IMAGE_TOP)
    { 
      IMAGE_TOP = pixelY;
    }
    if(pixelY > IMAGE_BOTTOM)
    {
      IMAGE_BOTTOM = pixelY;
    }
  }
  
  LCD_SetTextColor(BackColor);  

  /*  Loop through the rows of the image. */
  for (pixelY = IMAGE_TOP; pixelY < IMAGE_BOTTOM; pixelY++) 
  {  
    /* Build a list of nodes. */
    nodes = 0; j = PointCount-1;

    for (i = 0; i < PointCount; i++) 
    {
      if (((POLY_Y(i)<(double) pixelY) && (POLY_Y(j)>=(double) pixelY)) || ((POLY_Y(j)<(double) pixelY) && (POLY_Y(i)>=(double) pixelY))) 
      {
        nodeX[nodes++]=(int) (POLY_X(i)+((pixelY-POLY_Y(i))*(POLY_X(j)-POLY_X(i)))/(POLY_Y(j)-POLY_Y(i))); 
      }
      j = i; 
    }
  
    /* Sort the nodes, via a simple "Bubble" sort. */
    i = 0;
    while (i < nodes-1) 
    {
      if (nodeX[i]>nodeX[i+1]) 
      {
        swap = nodeX[i]; 
        nodeX[i] = nodeX[i+1]; 
        nodeX[i+1] = swap; 
        if(i)
        {
          i--; 
        }
      }
      else 
      {
        i++;
      }
    }
  
    /*  Fill the pixels between node pairs. */
    for (i = 0; i < nodes; i+=2) 
    {
      if(nodeX[i] >= IMAGE_RIGHT) 
      {
        break;
      }
      if(nodeX[i+1] > IMAGE_LEFT) 
      {
        if (nodeX[i] < IMAGE_LEFT)
        {
          nodeX[i]=IMAGE_LEFT;
        }
        if(nodeX[i+1] > IMAGE_RIGHT)
        {
          nodeX[i+1] = IMAGE_RIGHT;
        }
        LCD_SetTextColor(BackColor);
        LCD_DrawLine(pixelY, nodeX[i+1], nodeX[i+1] - nodeX[i], LCD_DIR_HORIZONTAL);
        LCD_SetTextColor(TextColor);
        PutPixel(pixelY, nodeX[i+1]);
        PutPixel(pixelY, nodeX[i]);
        /* for (j=nodeX[i]; j<nodeX[i+1]; j++) PutPixel(j,pixelY); */
      }
    }
  } 

  /* draw the edges */
  LCD_SetTextColor(TextColor);
}

/**
  * @brief  Reset LCD control line(/CS) and Send Start-Byte
  * @param  Start_Byte: the Start-Byte to be sent
  * @retval None
  */
void LCD_nCS_StartByte(uint8_t Start_Byte)
{
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_RESET);

  SPI_SendData8(LCD_SPI, Start_Byte);
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE)== RESET);
  SPI_ReceiveData8(LCD_SPI);
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_TXE) == RESET);
}


/**
  * @brief  Writes index to select the LCD register.
  * @param  LCD_Reg: address of the selected register.
  * @retval None
  */
void LCD_WriteRegIndex(uint8_t LCD_Reg)
{
  /* Reset LCD control line(/CS) and Send Start-Byte */
  LCD_nCS_StartByte(START_BYTE | SET_INDEX);

  /* Write 16-bit Reg Index (High Byte is 0) */
  SPI_SendData8(LCD_SPI, 0x00);
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_TXE) == RESET);
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE)== RESET);
  SPI_ReceiveData8(LCD_SPI);
  
  SPI_SendData8(LCD_SPI, LCD_Reg);
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE)== RESET);
  SPI_ReceiveData8(LCD_SPI);
  /* Wait until a data is sent(not busy), before config /CS HIGH */
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}


/**
  * @brief  Writes to the selected LCD register.
  * @param  LCD_Reg: address of the selected register.
  * @param  LCD_RegValue: value to write to the selected register.
  * @retval None
  */
void LCD_WriteReg(uint8_t LCD_Reg, uint16_t LCD_RegValue)
{
  /* Write 16-bit Index (then Write Reg) */
  LCD_WriteRegIndex(LCD_Reg);

  /* Write 16-bit Reg */
  /* Reset LCD control line(/CS) and Send Start-Byte */
  LCD_nCS_StartByte(START_BYTE | LCD_WRITE_REG);

  SPI_SendData8(LCD_SPI, LCD_RegValue >> 8);
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE)== RESET);
  SPI_ReceiveData8(LCD_SPI);
  
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_TXE) == RESET);
  SPI_SendData8(LCD_SPI, (LCD_RegValue & 0xFF));
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE)== RESET);
  SPI_ReceiveData8(LCD_SPI);
  
  /* Wait until a data is sent(not busy), before config /CS HIGH */
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}


/**
  * @brief  Reads the selected LCD Register.
  * @note   For HX8347G controller, the LCD registers are 8-bit length 
  *         while it is 16-bit lenght for ILI9328 controller.
  * @param  LCD_Reg: address of the selected register.
  * @retval LCD Register Value.
  */
uint16_t LCD_ReadReg(uint8_t LCD_Reg)
{
  uint32_t i;
  
  /* Check if the LCD controller is already recognized or not */
  if(LCDType == LCD_HX8347G)
  {
    /********************* HX8347G Read Sequence ******************************/
    /* Write 16-bit Index (then Read Reg) */
    LCD_WriteRegIndex(LCD_Reg);

    /* Read 16-bit Reg */
    /* Reset LCD control line(/CS) and Send Start-Byte */
    LCD_nCS_StartByte(START_BYTE | LCD_READ_REG);
    
    /* Wait until a data is sent(not busy), before reading dummy bytes*/
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)

    /* Read upper byte */
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_TXE) == RESET);
    SPI_SendData8(LCD_SPI, 0xFF);
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE)== RESET);
    return(SPI_ReceiveData8(LCD_SPI));
  }
  else if(LCDType == LCD_ILI9328)
  {
    /********************* ILI9328 Read Sequence ******************************/
    /* Write 16-bit Index (then Read Reg) */
    LCD_WriteRegIndex(LCD_Reg);
    /* Read 16-bit Reg */
    /* Reset LCD control line(/CS) and Send Start-Byte */
    LCD_nCS_StartByte(START_BYTE | LCD_READ_REG);
    
    for(i = 0; i < 5; i++)
    {
      SPI_SendData8(LCD_SPI, 0xFF);
      while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
      /* One byte of invalid dummy data read after the start byte */
      while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE) == RESET);
      SPI_ReceiveData8(LCD_SPI); 
    }
    /* Send dummy byte */
    SPI_SendData8(LCD_SPI, 0xFF);
    /* Read upper byte */
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
    /* Read lower byte */
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE) == RESET);
    /* Send dummy byte */
    SPI_SendData8(LCD_SPI, 0xFF);
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
    /* Read lower byte */
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE) == RESET);
    return(SPI_I2S_ReceiveData16(LCD_SPI));
  }
  else /* The LCD controller isn't yet recognized */
  {
    /********************* HX8347G Read Sequence ******************************/
    /* Write 16-bit Index (then Read Reg) */
    LCD_WriteRegIndex(LCD_Reg);

    /* Read 16-bit Reg */
    /* Reset LCD control line(/CS) and Send Start-Byte */
    LCD_nCS_StartByte(START_BYTE | LCD_READ_REG);
    
    /* Wait until a data is sent(not busy), before reading dummy bytes*/
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)

    /* Read upper byte */
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_TXE) == RESET);
    SPI_SendData8(LCD_SPI, 0xFF);
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE)== RESET);
    if(SPI_ReceiveData8(LCD_SPI) == LCD_HX8347G)
    {
      LCDType = LCD_HX8347G;
    }
    else
    {
      LCDType = LCD_ILI9328;
    }
    return(LCDType);
  }
}


/**
  * @brief  Prepare to write to the LCD RAM.
  * @param  None
  * @retval None
  */
void LCD_WriteRAM_Prepare(void)
{
  LCD_WriteRegIndex(LCD_REG_34); /* Select GRAM Reg */

  /* Reset LCD control line(/CS) and Send Start-Byte */
  LCD_nCS_StartByte(START_BYTE | LCD_WRITE_REG);
}


/**
  * @brief  Writes 1 word to the LCD RAM.
  * @param  RGB_Code: the pixel color in RGB mode (5-6-5).
  * @retval None
  */
void LCD_WriteRAMWord(uint16_t RGB_Code)
{
  LCD_WriteRAM_Prepare();

  LCD_WriteRAM(RGB_Code);
  
  /* Wait until a data is sent(not busy), before config /CS HIGH */
  while (SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET);
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}

/**
  * @brief  Writes to the LCD RAM.
  * @param  RGB_Code: the pixel color in RGB mode (5-6-5).
  * @retval None
  */
void LCD_WriteRAM(uint16_t RGB_Code)
{ 
  SPI_SendData8(LCD_SPI, RGB_Code >> 8);
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_TXE) == RESET);
  
  SPI_SendData8(LCD_SPI, RGB_Code & 0xFF);
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_TXE) == RESET);
}


/**
  * @brief  Power on the LCD.
  * @param  None
  * @retval None
  */
void LCD_PowerOn(void)
{
  if(LCDType == LCD_HX8347G)
  {
    /* Power on setting up flow */
    LCD_WriteReg(LCD_REG_24, 0x36); /* Display frame rate = 70Hz RADJ = '0110' */
    LCD_WriteReg(LCD_REG_25, 0x01); /* OSC_EN = 1 */
    LCD_WriteReg(LCD_REG_28, 0x06); /* AP[2:0] = 111 */
    LCD_WriteReg(LCD_REG_31,0x90); /* GAS=1, VOMG=00, PON=1, DK=0, XDK=0, DVDH_TRI=0, STB=0*/
    _delay_(10);
    /* 262k/65k color selection */
    LCD_WriteReg(LCD_REG_23, 0x05); /* default 0x06 262k color,  0x05 65k color */
    /* SET PANEL */
    LCD_WriteReg(LCD_REG_54, 0x09); /* SS_PANEL = 1, GS_PANEL = 0,REV_PANEL = 0, BGR_PANEL = 1 */
  }
  else
  {
    /* Power On sequence -----------------------------------------------------*/
    LCD_WriteReg(LCD_REG_16, 0x0000); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
    LCD_WriteReg(LCD_REG_17, 0x0000); /* DC1[2:0], DC0[2:0], VC[2:0] */
    LCD_WriteReg(LCD_REG_18, 0x0000); /* VREG1OUT voltage */
    LCD_WriteReg(LCD_REG_19, 0x0000); /* VDV[4:0] for VCOM amplitude */
    _delay_(20);                      /* Dis-charge capacitor power voltage (200ms) */
    LCD_WriteReg(LCD_REG_16, 0x17B0); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
    LCD_WriteReg(LCD_REG_17, 0x0137); /* DC1[2:0], DC0[2:0], VC[2:0] */
    _delay_(5);                       /* Delay 50 ms */
    LCD_WriteReg(LCD_REG_18, 0x0139); /* VREG1OUT voltage */
    _delay_(5);                       /* delay 50 ms */
    LCD_WriteReg(LCD_REG_19, 0x1d00); /* VDV[4:0] for VCOM amplitude */
    LCD_WriteReg(LCD_REG_41, 0x0013); /* VCM[4:0] for VCOMH */
    _delay_(5);                       /* delay 50 ms */
    LCD_WriteReg(LCD_REG_7, 0x0173);  /* 262K color and display ON */
  }
}


/**
  * @brief  Enables the Display.
  * @param  None
  * @retval None
  */
void LCD_DisplayOn(void)
{
  /* Display On */
  if(LCDType == LCD_HX8347G)
  {
    LCD_WriteReg(LCD_REG_40, 0x38);
    _delay_(60);
    LCD_WriteReg(LCD_REG_40, 0x3C);
  }
  else
  {
    LCD_WriteReg(LCD_REG_7, 0x0173);
  }
}


/**
  * @brief  Disables the Display.
  * @param  None
  * @retval None
  */
void LCD_DisplayOff(void)
{
  /* Display On */
  if(LCDType == LCD_HX8347G)
  {
    LCD_WriteReg(LCD_REG_40, 0x38);
    _delay_(60);
    LCD_WriteReg(LCD_REG_40, 0x04);
  }
  else
  {
    /* Display Off */
    LCD_WriteReg(LCD_REG_7, 0x0);
  }
}


/**
  * @brief  Configures LCD control lines in Output Push-Pull mode.
  * @note   The LCD_NCS line can be configured in Open Drain mode  
  *         when VDDIO is lower than required LCD supply.
  * @param  None
  * @retval None
  */
void LCD_CtrlLinesConfig(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_AHBPeriphClockCmd(LCD_NCS_GPIO_CLK, ENABLE);

  /* Configure NCS in Output Push-Pull mode */
  GPIO_InitStructure.GPIO_Pin = LCD_NCS_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(LCD_NCS_GPIO_PORT, &GPIO_InitStructure);

  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}

/**
  * @brief  Sets or reset LCD control lines.
  * @param  GPIOx: where x can be B or D to select the GPIO peripheral.
  * @param  CtrlPins: the Control line.
  *   This parameter can be:
  *     @arg LCD_NCS_PIN: Chip Select pin
  *     @arg LCD_NWR_PIN: Read/Write Selection pin
  *     @arg LCD_RS_PIN: Register/RAM Selection pin
  * @param  BitVal: specifies the value to be written to the selected bit.
  *   This parameter can be:
  *     @arg Bit_RESET: to clear the port pin
  *     @arg Bit_SET: to set the port pin
  * @retval None
  */
void LCD_CtrlLinesWrite(GPIO_TypeDef* GPIOx, uint16_t CtrlPins, BitAction BitVal)
{
  /* Set or Reset the control line */
  GPIO_WriteBit(GPIOx, (uint16_t)CtrlPins, (BitAction)BitVal);
}


/**
  * @brief  Configures the LCD_SPI interface.
  * @param  None
  * @retval None
  */
void LCD_SPIConfig(void)
{
  SPI_InitTypeDef    SPI_InitStructure;
  GPIO_InitTypeDef   GPIO_InitStructure;

  /* Enable LCD_SPI_SCK_GPIO_CLK, LCD_SPI_MISO_GPIO_CLK and LCD_SPI_MOSI_GPIO_CLK clock */
  RCC_AHBPeriphClockCmd(LCD_SPI_SCK_GPIO_CLK | LCD_SPI_MISO_GPIO_CLK | LCD_SPI_MOSI_GPIO_CLK, ENABLE);

  /* Enable LCD_SPI and SYSCFG clock  */
  RCC_APB1PeriphClockCmd(LCD_SPI_CLK, ENABLE);
  
  /* Configure LCD_SPI SCK pin */
  GPIO_InitStructure.GPIO_Pin = LCD_SPI_SCK_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(LCD_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);

  /* Configure LCD_SPI MISO pin */
  GPIO_InitStructure.GPIO_Pin = LCD_SPI_MISO_PIN;
  GPIO_Init(LCD_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);

  /* Configure LCD_SPI MOSI pin */
  GPIO_InitStructure.GPIO_Pin = LCD_SPI_MOSI_PIN;
  GPIO_Init(LCD_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);

  /* Connect SPI SCK */
  GPIO_PinAFConfig(LCD_SPI_SCK_GPIO_PORT, LCD_SPI_SCK_SOURCE, LCD_SPI_SCK_AF);

  /* Connect SPI MISO */
  GPIO_PinAFConfig(LCD_SPI_MISO_GPIO_PORT, LCD_SPI_MISO_SOURCE, LCD_SPI_MISO_AF);

  /* Connect SPI MOSI */
  GPIO_PinAFConfig(LCD_SPI_MOSI_GPIO_PORT, LCD_SPI_MOSI_SOURCE, LCD_SPI_MOSI_AF);
  
  SPI_I2S_DeInit(LCD_SPI);
  
  /* SPI Config */
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_Init(LCD_SPI, &SPI_InitStructure);

  /* Configure the RX FIFO Threshold */
  SPI_RxFIFOThresholdConfig(LCD_SPI, SPI_RxFIFOThreshold_QF);

  /* SPI enable */
  SPI_Cmd(LCD_SPI, ENABLE);
}

/**
  * @brief  Displays a pixel.
  * @param  x: pixel x.
  * @param  y: pixel y.  
  * @retval None
  */
static void PutPixel(int16_t x, int16_t y)
{ 
  if(x < 0 || x > 239 || y < 0 || y > 319)
  {
    return;  
  }
  LCD_DrawLine(x, y, 1, LCD_DIR_HORIZONTAL);
}

#ifndef USE_Delay
/**
  * @brief  Inserts a delay time.
  * @param  nCount: specifies the delay time length.
  * @retval None
  */
static void delay(__IO uint32_t nCount)
{
  __IO uint32_t index = 0; 
  for(index = (65500 * nCount); index != 0; index--)
  {
  }
}
#endif /* USE_Delay*/
/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */ 

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
